Depending on the size of the access panel, four or more locking sash-latches are located strategically on the panel assembly ensuring the tray is held firmly in place into the frame. The location of the sash-latches is engineered to ensure that the tray remains rigid (reducing warping) and at the same time the outer frame is not affected by torsion forces transferred from the sheet metal duct, which may cause an integrity failure through a widening of the tray/frame gap.

Effective Fireproofing

When correctly filled and installed into the appropriate elements and in accordance with the manufacturers written instructions, the LAF Igniseal® Panel will achieve up to 240/240/240 Fire Resistance Level. Most importantly a FRL of 240/240/240 including the insulation criteria is mandatory for all permanently fixed access panels, whilst for hinged doors and hinged access panels the insulation criteria may be reduced. This peculiar code requirement stems from the probability that combustible materials are likely to be stored in close proximity to a fixed access panel, whilst the same may not be the case for a hinged panel which might otherwise be used regularly and less likely to end up behind combustibles.